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Method for providing image alignment feedback for panorama (composite) images in digital cameras using edge detection

  • US 7,289,147 B2
  • Filed: 02/03/2004
  • Issued: 10/30/2007
  • Est. Priority Date: 02/03/2004
  • Status: Active Grant
First Claim
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1. A digital camera system comprising:

  • a lens;

    an image sensor for sensing an image viewed by the lens;

    a display for displaying the image sensed by the image sensor;

    a volatile storage device for storing the image sensed by the image sensor;

    processing circuitry coupled to the display, image sensor, and nonvolatile storage device; and

    a processing algorithm that runs on the processing circuitry that implements an edge detection filter that;

    captures an image that is to be used as part of a panorama image sequence;

    processes the captured image using the edge detection filter;

    applies the edge detection filter to a portion of the captured image that will overlap with a subsequent image of the panorama sequence;

    computes a histogram of resultant values derived from the edge detection filter to identify a threshold value that is related to a number of edges of the processed image;

    alters the threshold value such that the number of displayed edges will be decreased;

    extracts image pixels near the edges of the captured image; and

    superimposes the extracted pixels over the liveview image of the subsequent image.

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